Explain how genes are expressed for a particular reason

Each cell expresses, or turns on, only a fraction of its genes. The rest of the genes are repressed, or turned off.

The turned on genes are then first transcribed into messenger RNA by the process of Transcription.

Then the mRNA is Translated into protein by the process called Translation.

This is how the specific genes are expressed.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus